001 //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.3_testing/src/org/deegree/io/datastore/idgenerator/ParentIDGenerator.java $
002 /*----------------------------------------------------------------------------
003 This file is part of deegree, http://deegree.org/
004 Copyright (C) 2001-2009 by:
005 Department of Geography, University of Bonn
006 and
007 lat/lon GmbH
008
009 This library is free software; you can redistribute it and/or modify it under
010 the terms of the GNU Lesser General Public License as published by the Free
011 Software Foundation; either version 2.1 of the License, or (at your option)
012 any later version.
013 This library is distributed in the hope that it will be useful, but WITHOUT
014 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
015 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
016 details.
017 You should have received a copy of the GNU Lesser General Public License
018 along with this library; if not, write to the Free Software Foundation, Inc.,
019 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
020
021 Contact information:
022
023 lat/lon GmbH
024 Aennchenstr. 19, 53177 Bonn
025 Germany
026 http://lat-lon.de/
027
028 Department of Geography, University of Bonn
029 Prof. Dr. Klaus Greve
030 Postfach 1147, 53001 Bonn
031 Germany
032 http://www.geographie.uni-bonn.de/deegree/
033
034 e-mail: info@deegree.org
035 ----------------------------------------------------------------------------*/
036 package org.deegree.io.datastore.idgenerator;
037
038 import java.util.Properties;
039
040 import org.deegree.io.datastore.DatastoreTransaction;
041 import org.deegree.io.datastore.FeatureId;
042 import org.deegree.io.datastore.schema.MappedFeatureType;
043
044 /**
045 * {@link IdGenerator} that takes the {@link FeatureId} of the parent feature.
046 *
047 * @author <a href="mailto:schneider@lat-lon.de">Markus Schneider </a>
048 * @author last edited by: $Author: mschneider $
049 *
050 * @version $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
051 */
052 public class ParentIDGenerator extends IdGenerator {
053
054 /**
055 * Creates a new <code>ParentIDGenerator</code> instance.
056 *
057 * @param params
058 * configuration parameters
059 */
060 public ParentIDGenerator (Properties params) {
061 super (params);
062 }
063
064 /**
065 * Returns a new primary key.
066 *
067 * @param ta
068 * datastore transaction (context)
069 * @return a new primary key.
070 * @throws IdGenerationException
071 * if the generation of the id could not be performed
072 */
073 @Override
074 public String getNewId( DatastoreTransaction ta ) throws IdGenerationException {
075 throw new UnsupportedOperationException(
076 "ParentIDGenerator cannot be used to generate primary keys (that are no feature ids)." );
077 }
078
079 /**
080 * Returns a new id for a feature of the given type.
081 *
082 * @param ft
083 * (mapped) feature type (irrelevant for this generator)
084 * @param ta
085 * datastore transaction (context)
086 * @return a new feature id.
087 * @throws IdGenerationException
088 */
089 @Override
090 public FeatureId getNewId( MappedFeatureType ft, DatastoreTransaction ta ) throws IdGenerationException {
091 throw new UnsupportedOperationException(
092 "ParentIDGenerator cannot be used to generate feature ids (without information on the parent feature." );
093 }
094 }